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PRACTICAL ORGANIC CHEMISTRY

SOLUBLE LIQUIDS AND SOLIDS (continued}.


	Soluble.
	Melting-point.
	Boil in {j-point.

Bases — Methylamine (p   So)  .                             ....
	
	
	(Tin

JJimethylamine        .....
	
	
	

'Primethylamine  .   •
	"
	
	"

Kthylarnine   .....       .   .                  .   .
	"
	
	"

JJiethylamine    .......           .....
	"
	
	t^j

Urethane   ......
	"
	c^
	


	' '
	*
	Q ^

o- Phenylenediamine   .   .
	h s.
	TO°
	

«/-               ,,               (p- 155)   ........
	
	(> ] j j j
	-

yj-Aminophenol (p.  140)     ...
	"
	184
	

J-*yridine
	"
	
	116

Caffeine (p   1^1) •
	
	0 i4
	

Amides and Cyanides — Formamide   ....          .........
	s
	
	

Acetamide (p. 77)   ............. Urea (p.  i°6)    .......           .....
	
	82
 1 32
	P22

Thiourea (p.  128)    .............
	h.".
	T72
	' '

Succiniruide      .               .              .....
	
	T?6
	


	h.s
	
	

Konnanilide .   .
	
	46
	

Acetanilide (p.  151)    ...........
 Aretonitrile (p   79)
	»
	112
	_

Salts of bases and acids.
 Acid anhydrides and chlorides dissolve gradually on warming and yield the acid.
	
	
	

The above preliminary investigation will determine the further
course of investigation, but the following rough plan may serve
as a guide.
§ I. SINGLE SUBSTANCE SOLUBLE IN WATER :—
i. Contains only Carbon, Hydrogen and Oxygen.—
The number of such substances, as seen from the above table, is
comparatively small. It may be an alcohol, aldehyde or ketone
of low molecular weight, acid, phenol, carbohydrate or glitcoside.
Acids.—Make a solution (if not already dissolved) and test
with litmus. If the liquid is acid, a free acid\s probably present.
If the liquid is neutral and a metal has been found, a metallic
salt is probably present. If the liquid is alkaline, it may be the
alkaline salt of a phenol or an alkaline cyanide, both of which
are hydrolysed in solution. The separation and identification of
the acid is not a very simple matter. If the acid is an aromatic